Abstract: A high-efficiency yield-increasing exploitation method for natural gas hydrates includes steps of drilling of natural gas hydrate reservoirs along horizontal wells, seepage increasing by fracturing for fracture forming and stability improvement by grouting in the natural gas hydrate reservoirs, and yield improvement by combined exploitation of depressurization of the horizontal wells and heat injection; according to the present invention, drilling time is shortened by rapid drilling along the horizontal wells, the permeability of the reservoirs can be effectively improved by fracturing for fracture forming, the stability of the reservoirs can be improved by injecting foam cement slurry into the reservoirs, and the yield of the natural gas hydrates can be improved by the combined exploitation method of depressurization of the horizontal wells and heat injection.

Abstract: A high-efficiency yield-increasing exploitation method for natural gas hydrates includes steps of drilling of natural gas hydrate reservoirs along horizontal wells, seepage increasing by fracturing for fracture forming and stability improvement by grouting in the natural gas hydrate reservoirs, and yield improvement by combined exploitation of depressurization of the horizontal wells and heat injection; according to the present invention, drilling time is shortened by rapid drilling along the horizontal wells, the permeability of the reservoirs can be effectively improved by fracturing for fracture forming, the stability of the reservoirs can be improved by injecting by the combined exploitation method of depressurization of the horizontal wells and heat injection.

Abstract: An apparatus for preventing and controlling secondary generation of hydrates in a wellbore during depressurization exploitation of offshore natural gas hydrates includes a gas recovery pipe column, a water recovery pipe column, a gas-liquid mixed transportation pipe section, a data collecting and processing unit, and a reaction control apparatus; according to characteristics of different exploitation pipe columns, three injection pipelines and three monitoring points are arranged to predict dynamic changes in a secondary generation risk of the hydrates throughout the wellbore; measures for preventing and controlling the secondary generation of the hydrates are taken at different pipe column positions by the integrated utilization of inhibitor injection, heating for pipe columns, the additional arrangement of electric submersible pumps, and other methods.

Abstract: A pixel unit is used in an array substrate of a display device. In one embodiment, it comprises a gate line, a source-drain line and a thin-film transistor; and the gate line is in an overlapped structure comprising a first MoW layer, a Cu layer and a second MoW layer overlapped successively; and a gate of the thin-film transistor is formed of the first MoW layer. In another embodiment, the source-drain line is in a same overlapped structure; and a source and a drain of the thin-film transistor are formed of the first MoW layer. The first embodiment is achieved by means of a halftone process while the second embodiment is achieved by means of a lift off process. Diffusion of Cu in the gate layer or in the source-drain layer towards the oxide active layer is prevented.

Abstract: Provided are a pixel circuit and driving method thereof and a display apparatus. The pixel circuit comprises a first transistor (T1), a second transistor (T2), a third transistor (T3), a storage capacitor (C1), a parasitic capacitor (C2) and a light emitting device (L).

Abstract: A pixel unit is used in an array substrate of a display device. In one embodiment, it comprises a gate line, a source-drain line and a thin-film transistor; and the gate line is in an overlapped structure comprising a first MoW layer, a Cu layer and a second MoW layer overlapped successively; and a gate of the thin-film transistor is formed of the first MoW layer. In another embodiment, the source-drain line is in a same overlapped structure; and a source and a drain of the thin-film transistor are formed of the first MoW layer. The first embodiment is achieved by means of a halftone process while the second embodiment is achieved by means of a lift off process. Diffusion of Cu in the gate layer or in the source-drain layer towards the oxide active layer is prevented.

Abstract: Provided are a pixel circuit and driving method thereof and a display apparatus. The pixel circuit comprises a first transistor (T1), a second transistor (T2), a third transistor (T3), a storage capacitor (C1), a parasitic capacitor (C2) and a light emitting device (L).